Pascal (Lazarus/Delphi)

Xero List Attachments for an Item (such as an Invoice)

See more Xero Examples

Demonstrates how to get information about the attachments for a particular Xero item. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  jsonToken: TJsonObject;
  url: string;
  resp: THttpResponse;
  jsonResponse: TJsonObject;
  AttachmentID: string;
  FileName: string;
  v_Url: string;
  MimeType: string;
  ContentLength: Integer;
  Id: string;
  Status: string;
  ProviderName: string;
  DateTimeUTC: string;
  i: Integer;
  count_i: Integer;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  http := THttp.Create;

  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/xero-access-token.json');
  if (success = False) then
    begin
      WriteLn(jsonToken.LastErrorText);
      Exit;
    end;

  http.AuthToken := jsonToken.StringOf('access_token');

  //  Replace the value here with an actual tenant ID obtained from this example:
  //  Get Xero Tenant IDs
  http.SetRequestHeader('Xero-tenant-id','83299b9e-5747-4a14-a18a-a6c94f824eb7');

  http.Accept := 'application/json';

  url := 'https://api.xero.com/api.xro/2.0/{$Endpoint}/{$Guid}/Attachments/';

  //  Endpoint can be Invoices, Receipts, CreditNotes, PurchaseOrders, etc.
  http.SetUrlVar('Endpoint','Invoices');

  //  Guid is the ID of the item, such as the InvoiceID.
  http.SetUrlVar('Guid','0032f627-3156-4d30-9b1c-4d3b994dc921');

  resp := THttpResponse.Create;
  success := http.HttpNoBody('GET',url,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  WriteLn('Response Status Code: ' + resp.StatusCode);

  jsonResponse := TJsonObject.Create;
  jsonResponse.Load(resp.BodyStr);
  jsonResponse.EmitCompact := False;
  WriteLn(jsonResponse.Emit());

  if (resp.StatusCode <> 200) then
    begin
      WriteLn('Failed.');
      Exit;
    end;

  //  Sample response:
  //  
  //  Use the this online tool to generate parsing code from sample JSON: 
  //  Generate Parsing Code from JSON

  //  {
  //    "Id": "24bfbcb9-dec9-4d33-835c-8f165d776766",
  //    "Status": "OK",
  //    "ProviderName": "Chilkat2222",
  //    "DateTimeUTC": "\/Date(1587213296972)\/",
  //    "Attachments": [
  //      {
  //        "AttachmentID": "daf106e2-8634-4349-bfcc-86c1df0793b2",
  //        "FileName": "penguins.jpg",
  //        "Url": "https://api.xero.com/api.xro/2.0/Invoices/0032f627-3156-4d30-9b1c-4d3b994dc921/Attachments/penguins.jpg",
  //        "MimeType": "image/jpg",
  //        "ContentLength": 777835
  //      }
  //    ]
  //  }

  Id := jsonResponse.StringOf('Id');
  Status := jsonResponse.StringOf('Status');
  ProviderName := jsonResponse.StringOf('ProviderName');
  DateTimeUTC := jsonResponse.StringOf('DateTimeUTC');
  i := 0;
  count_i := jsonResponse.SizeOfArray('Attachments');
  while i < count_i do
    begin
      jsonResponse.I := i;
      AttachmentID := jsonResponse.StringOf('Attachments[i].AttachmentID');
      FileName := jsonResponse.StringOf('Attachments[i].FileName');
      v_Url := jsonResponse.StringOf('Attachments[i].Url');
      MimeType := jsonResponse.StringOf('Attachments[i].MimeType');
      ContentLength := jsonResponse.IntOf('Attachments[i].ContentLength');
      i := i + 1;
    end;



  http.Free;
  jsonToken.Free;
  resp.Free;
  jsonResponse.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.